The removal of scale from the surface of a metal, especially from the inner surfaces of boilers etc.(noun)
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Use "descaling" in a sentence
"That means changing the water daily and descaling and disinfecting parts with a combination of vinegar and bleach."
"Quokks, I have one of those descaling razor thingies used to shave the skin off your feet when you want to wear those shoes that are just a little bit too tight."
"Follow the manufacturer's directions and schedule for descaling and disinfecting parts and replacing filters, wicks, and the like."